title: QT interval prolongation and prognosis: further validation of the quantitative approach to electrocardiography.
mesh_terms: D044383:Black People / Q000706:statistics & numerical data; D003327:Coronary Disease / Q000175:diagnosis* / Q000453:epidemiology / Q000208:ethnology; D004562:Electrocardiography / Q000379:methods; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D044465:White People / Q000706:statistics & numerical data